Canada



(No Model.)

B. I}. OLSEN & 0. GABRIEL.-

MOLD FOR FORMING DRAIN PIPES.

. No. 404,219. Patented May 28. I889.

lllllllllllllllll \\\I e a N \Q r o 1 e W K HQ i 5 Thel'ners hell eter'than thegouter shell or mold and corre.

"NITED STATES suntan EMI'L oLsEn AND CHARLES GABRIEL, OF VICTORIA, BRITISH COLUMBIA, CANADA.-

MOLD FOREYORMING DRAIN-PIPES.

\ srncirion'rron forming art of Letters Patent no.4o4, 21e, dated May as, 1889.

Application filed January 3; 1889.

To all whom it may concern: I

Be it known that we, BERTEL ill/ IL OLSEN and CHARLES GABRIEL, citizens ofthe United States,,r esidingat- Victoria, BritisltColumbia, 5 Canada, have invented anew and useful Improvement in Molds for Forming Drain Pipes, of which the following is'a' specification.

Oui invention relates to an improvement in molds for forming drain-pipes; and itconsists in the peculiar construction and combination ofdevices that will be more fully ,setforth hereinafter,'and particularly pointed out in the'claims.

The object of our invention is to provide a mold which is adapted to form a drain-pipe from composition or plastic material audio "liberate"thefpfpewithoutinjurytheretoafter the composition has set or hardened;

In the accompanying drawings, Figure 1 is a longitudinal sectional view of a mold embodying our improvement. Fig. 2 is a vertical transverse sectional view of the same.

Fig. 3 is a similar view showing the innencere arranged in a diiferent position. Fig. 4 is a agiouigitudinal sectionalview of a pair of our improved drain-pipes, showing the mode of coupling them together when laying the same. The outer shell or mold, A, is cylindrical-in l,} shape, at suitable length and diameter, and 0 has an enlargement, B, formed at one end, to

v provide the corresponding enlarged .end of the drain-pipe. Both ends of the mold are closed, and the smaller end, 0, thereof is provided on its inner. side with an annular groove, D,

g whith isarranged concentrically with the sides of the-mold. The latter is formed-oi two longitudinal sections, E, F, eachl'ot. whichiis semi-cylindrical in shape; the saidfsections being red together at one iildfiihyihiiiged 4o menihen's Q; andhaving ears Hformed'ontheir opp'esite sides adapted to meet when the sections ahelclosed together and to receive befits hywherehy the said sections may be firmly secured when closed. 1 or core, -K, is of less diamspe ds with thelatter in shape and is adapted to fit cone aw therein, with its smaller and engngthe annular groove 10, whereby 5c the core or inner shell will be retained in the correct relative position with in the mold. The

Serial No. 295,298. (NomodeL) said core comprises a pair of segments, L, and an intermediate pair of smaller segments, M, adaptedto fit between the opposing edges of the segments L. A shaft,- N, extends longitudinally through the center of the mold, is journaled ina central openingin the enlarged end thereof, and has its inner end stepped in a central recess in the smaller end of the mold. At the outer end of the said shaft is a crank, O, which adapts it to be rotated, andprojecting from opposite sides of the said shaft at suitable intervals throughout its length are arms P, which are adapted, when the shaft is turned to the position shown in Fig. 2, to arrange the segmentsM in the same radius with the-segments L, and when the shaft- N is tnrned te -the position illustrated inFig. 3

release the latter and permit them to be readily removed from the mold.

The composition while in a plastic condition is forced into the mold when the latter is arranged in a position shown in Fig. 2, and caused to fill the annular space between the outer shell and the inner shell or core, the enlarged portion B of the mold being provided with openings R,through which the composition is introduced. When the composition has set or hardened sufficiently, the sections of the outer shell or mold are opened on their hinges and the shaft N is turned to the posisegments M and permitthe latter to be first removed from the interior of the pipe, after which the larger segmentali, inay be readily removed therefrom without injuring the pipe, thus enabling a pipe formed of composition to heprflneedthatwillnot crack and iiy to pieces while in the process of cooling and hardening. The smaller end of each pipe a is introduced into the larger end, I), of the adjeeentpipe when laying the same, and a suitable quantity of the same composition of which the pipes are formed is introduced into the annular space between said engaging smaller and larger ends of the said pipes through an opening, a, formed in the latter. When the composition sets, it unites the of he pipe practically integral, as it is imtion illustrated in Fig. 3, so as to release the said arm, by moving-past the segments M, will" The operation of our invention is as follows:

pipes so firmly as to"rcnder all the sections outer shell composed of sections hinged to gether and having closed ends with a core composed of separable segmental sections, and a central revoluble shaft having radial arms adapted to bear against the inner sides of the core-sections; substantially as set forth.

2. In a pipe-mold, the combination, with an outer shell having a closed end provided with an interiorannular groove, of a core composed of separable segmental sections having one end fitted in said groove, and a central revolnhle shaft having radial arms adapted to bear against the inner sides of the core-ss-"- separable segmental sections, in combination with the outer shell, and the central shaft -journaled in the ends of the latter and haw 'ing radiating arms adapted to bear against the inner sides of the core-sections, substantially as set forth.

' In testimony that we claim theforegoing as our own we have hereto affi xed our signatures in presence of two witnesses.

BERTEL EMIL OLSENQ CHARLES GABRIEL. Witnesses:

W. CHANTRELL MARTIN, R. WALPEY. 

